Problem
There are monks in a
monastry who don't speak(or communicate in any sense) with each other
and have no have no mirrors or any reflective surface at their
disposal. Evn the water they drink is from a "surahi" type
pitcher(the opening is narrow and no reflection can be seen) and the
floor is of extremely porous clay so that if u drop water to see
reflection, the ground soaks it up so fast that it won't work.Now their
leader is allowed to speak and he tells them that some monks have been
infected with a disease that has marked their forehead and that they
should leave of their own accord. But they are not told who is
infected. If there are n monks how many days it takes for them to
realise that they are infected and leave ?
Solution
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